He__________a good knowledge of Chinese history. You can ask him about the ancient China. [ ]

33Is it the letter you got yesterday ________ makes you so sad?

Whose names are these,________ or yours—_______. I don’t know all of the students in Class 5, so I have _______onthis piece of paper. theirs; They; them

Miss Green is the only person __________can help you with your English.

s are just a ________ of money, but one’s reallife value lies in his knowledge, morality and quality